<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    下面是个内嵌框架
    <iframe src="login.html" width="400" height="200" frameborder="0" scrolling="yes"></iframe>
    这里有个内嵌框架
</body>
</html>